Day 156 of 180Week 32 of 36, MondayFourth quarter

Explain the method

๐Ÿ”ข Math๐Ÿง  Reviewโฑ๏ธ about 30 minutes

They teach you long multiplication as if you had never seen it, using the area model.

A deliberate return to something from weeks ago. Forgetting a bit is the point.

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Today is rung 15 of 16 on this topic

Multi-digit multiplication

Can do: Multiplies 3-digit by 1-digit and 2-digit by 2-digit, and can explain the partial products.

Why it matters

It's where place value and times tables combine. A child who can only follow the steps breaks the moment there's a zero or a carry.

What it looks like when it's wobbly

Forgets to shift the second row, or writes the carried digit and then adds it in the wrong column.

โฑ๏ธ Two-minute check

"Work out 34 ร— 26 and 205 ร— 7." Then: "What does the second row of the first one mean?"

Solid looks like: Both correct, and they know row two is 20 ร— 34 rather than 2 ร— 34.

The full activity for this topic ยท 20 minutes

Area Model First

PaperRuler
  1. 1Draw a rectangle split into four boxes: 30 and 4 along the top, 20 and 6 down the side.
  2. 2Fill each box with its product: 600, 80, 180, 24.
  3. 3Add them up. That's the answer, and every step is visible.
  4. 4Now do the same sum in the column method and match each written step to a box.
  5. 5Estimate first every time โ€” 34 ร— 26 is roughly 30 ร— 25, about 750.

If it's too hard

2-digit by 1-digit with the area model only.

If it's too easy

3-digit by 2-digit, and a problem with a zero in the middle: 305 ร— 24.

Say this

"That row isn't 2 ร— 34 โ€” it's 20 ร— 34. That's why the zero goes there."

Math practice

Week 32 at a glance

  1. Monday ยท Day 156

    ๐Ÿ”ข Math

    Explain the method

  2. Tuesday ยท Day 157

    ๐Ÿ“– Reading

    Roots test, both ways

  3. Wednesday ยท Day 158

    ๐Ÿ”ข Math

    Scale a real plan

  4. Thursday ยท Day 159

    โœ๏ธ Writing

    Write for a reader

  5. Friday ยท Day 160

    ๐ŸŒ Social Studies

    Five regions, five facts

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